S-8077A351 3/8"-24 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel and black oxide finish, ideal for harsh industrial environments
• High tensile strength of 70,000 psi and minimum shear strength of 35,000 psi for reliable performance under heavy loads
• Precise Class 3A thread fit ensures secure, vibration-resistant connections in critical assemblies
• Knurled socket head with hex drive provides excellent grip and easy installation with standard tools
• Fine UNF thread spacing offers improved clamping force and reduced loosening in dynamic applications
• Accurate shoulder diameter and length with tight tolerances for consistent alignment and spacing in machinery
• Compliance with ASME B18.3, RoHS 3, and REACH guarantees quality, safety, and environmental standards

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw with black oxide finish is engineered to address common industrial challenges such as corrosion, misalignment, and mechanical stress. The Class 3A UNF thread and fine thread spacing provide superior holding power in high-vibration settings, reducing maintenance needs. Its robust 70,000 psi tensile strength and precise shoulder dimensions make it ideal for precision applications like robotics, automotive assemblies, and heavy machinery, where consistent performance and durability are critical. The knurled socket head ensures easy handling, speeding up installation in industrial fastening systems.

Specification Summary & Compliance

This shoulder screw features a Class 3A thread fit with 3/8"-24 UNF fine threads, ensuring high precision and reliability. Dimensions include a shoulder diameter of 1/2" (tolerance: -0.004" to -0.002") and shoulder length of 1 1/4" (tolerance: -0.005" to 0.005"), adhering to ASME B18.3 standards. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), meeting environmental and safety regulations for industrial use.